Continuous heating-furnace



T. 1. cosELL.l

CONTINUOUS HEATING FURNACE. APPLICATION FIVLED ocr. 3o. |920.

llgyT/Q K Parham/ed Nov, 15, WZL

2 SHEETS-SHEET 2.

` Warren, in the county of Trumbull and.

untreuv stares rnoiaasa't oosrnrno, or waaraan, omo.

narrar CONTINUOUS Hamme-nommen.

,l specification of Lettersratent.

application 'mea october so, 1920. semi no. 420,594.

TooZZ whom t may concern:

Be it known that l, THOMAS .JJ COSTELLO, a citizen of the United States', `residing at State of Ohio, have invented a new and useful Improvement in Continuous Heating- Furnaces, of which the following -is a full,

clear, and exact description, reference being had to the accompanying drawings, forming' part of this specification, in-which Figure l is a longitudinal vertical section of a heating furnace embodyi'ng'my invention;

F ig. 2 is a detail sectional view showing one of the supports for one of the watercooled skids;

Fig. 3 is a horizontal section of aportion v of the 'furnace cooled skids or bearing pieces upon which .dinally' lthrough the` heating chamber;

the billets or other blanks are moved through d the furnace. My improved furnace is particularly designed for use in connection with relatively Vthin blanks or billets. Here#v tofore considerable'dificuty has been experienced in moving blanks of this character through the furnace under the action of the pusher, by reason of the fact that the blanks.,

i substantially their initial curvature. override each other. My invention is par-l means preferably consist'of two-piece links ticularly designed to overcome this diffi-` tend to buckle upwardly on the skids and culty. l

he invention will be best understood by reference to the accompanying drawingsin which l have shown the preferred embodiment thereof and which will now 'be described, it being premised, however, that various changes may be made in the details of `construction and arrangement of the several parts, without departing from the spirit and scope of my inventiomas defined in the' appended claims. 1

In these drawings, the numeral 2 designates the walls of a continuous heating' fur-- -nace whichis 'generally of well known type,

the products of combustion passing longitu thejurnace from the combustion chaliibo xortica@ Patented Nov.

through one or more stack luesqataliefop, ,I

posite ends'. The billets or other blanks are pushed through the furnace by the action' of any suitable or well known pusher mecha-` nism indicated at 6, forming no part of present invention.

7 designatesv the billets are ushed through the furnace, these being preferably in the form of watercooled skid pipes, water beingintroduced the.

the bearing pieces on which into said pipes at the downwardly bent en d :f

portions 8 thereof at the 'discharge end.` In accordance with my invention, these pipes are given a curvature such that their lowest points are approximately at the middle of the heating chamber, the curvature `being preferably substantially gradual and ,uni-v form from end to end of their bearing portions. l have found that by reasonof. this curvature, the billets or other blanks may be pushed therethrough"4 without buckling or-y".

overriding, vthe curvature 'being effective to' overcome this difficulty.

The skids are preferably supported onta plurality of piers 9, which are supported-on suitable metal, Such ascast'iron, and whichv the bottom of the furnace and which' are ar- 1 f is formed with a longitudinal semi-circular groove l1 in its upper surface to receive and seat alskid pipe. Means are also preferably provided vfor positively holding the skid pipes under suiiicient tension to maintain Sechi or rods 12,l which maybe weldedv at theirup- E per ends to the skid pipes and which extend downwardly through the piers and through thefloor of the Aheating chamber into the 5 springs 16. .These tension springs, as will be readily seen, 'act-to hold the skid pipes at all times under sufficient tension to substan tially maintain their initial curvature. Inthis form the rods are shown as made in two pieces, the upper -piece having a lower eye which is vengaged .by a hook on the lower half; so that the upper half ma be set in the furnace chamberwith the-ski pipes and engaged with the lower halves which are inat the discharge end, and passing- 'out f l serted'frombelow.

' 'In'FigA 5 I show another preferredfform of holding down rods for the skid pipes.v In this form the rods are water-cooled, the upper pipe portion 17 being screwed-into, or otherwise securedA in the skid pipe, while its lower end is screw threaded eitherinternally, or externally, to-receive the pipe section 18 `forming 'the lower half of the water cooled rod. The lower end of the section 18 is preferably peened in to throttle the discharge so that a regulated amount of water will drip therefrom, this water being supplied from the skid pipe circulation. In this'form again I show the same adjustable collar or nut 14 screwed on the lower pipe section, and the tension spring 16 seated between the washer plates l5. The iiow of water through these hollow water-cooled holding down rods maybe regulated by valves, or otherwise, as desired.-

\ l watercooled bearing piece or skid for the blanks to be heated, said piece having a downward curvature intermediate its ends,

substantially as described.

` r3. A continuous heating furnace having a water-cooled bearing piece Aor skid for the blanksto he heated, said piece having a downward'fcurvature intermediate its ends, togetherwith means for` maintainingsuch curvature, substantially as described.

4. A continuous heating furnace having a skid or bearing piece for the blanks formed with a downward curvature intermediateits end portions, together with means for holding the piece or skid 'under tension to maintain its curvature, substantially as described..

5. A continuous heating furnace having a skid or bearing piece for thc blanks formed with a downward curvature intermediate its end portions, together with members coni connected to said members to thereby holdnected to said I piece or skid, and springs the piece or skid under tension and maintain its curvature, substantially asdescribed.

6.4 A continuous heatingr furnace having a plurality ofpiers or supports on its bottom and forined with grooves in their upper surfaces, andl longitudinally extending downwardly curved skids seated and held in such grooves, substantially as described.

,7. A continuous heating vfurnace having a plurality of piers or supports on its bottom and formed with grooves in their upper. surfaces, and longitudinally extending downwardly curved skids seated and held in such grooves, together with means for maintain ing a downward tension on said skids, sub stantially as described.

8. A continuous heating furnace having a .plurality of supporting piers extending up- 'wardly from the bottom of its heating chamber, said piershaving refractory blocks or saddles at their upper endsformed with longitudinally extending grooves, and a plurahty of downwardly curved skids seated 1nV said grooves, substantially as described.

.9. A*contin'tiousheating furnace having a plurality of supporting piersextending upwardly from the bottoni of its heating charnber, said piers having refractory blocks or saddles at their upper ends formed with longitudinally extending grooves, and a plurality of downwardly. curved; skids seated in said grooves, together with means for exerting a downward pull on said skids, substantially as des ribed.

' 10. A con nuous heating furnace having a water-cooled bearing piece or skid pipe and means'for exerting a downward tension-on parts, said parts being watercooled, sub-l .stantially as described.

In testimony whereof, have hereunto s'et my hand. i

THoMAs J. oosTELLo. 

